singrdk/base/Applications/Telnetd/Telnetd.sg

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////////////////////////////////////////////////////////////////////////////////
//
// Microsoft Research Singularity
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// File: Telnetd.cs
//
// Note: Simple Singularity telnet daemon
//
// TODO:
// - Graceful server shutdown?
// - non-null syntax
// - catch all appropriate exceptions
// - remove debugging traces
// - limit the number of simultaneous telnet sessions?
// - handle "exit" in shell gracefully
// - handle "client disconnect" gracefully
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using Microsoft.Singularity.Io;
using Microsoft.Singularity.Channels;
using Microsoft.Contracts;
using Microsoft.SingSharp.Reflection;
using Microsoft.Singularity.Applications;
using Microsoft.Singularity.Io;
using Microsoft.Singularity.Configuration;
[assembly: Transform(typeof(ApplicationResourceTransform))]
namespace Microsoft.Singularity.Telnetd
{
[ConsoleCategory(DefaultAction=true)]
internal class Parameters {
[InputEndpoint("data")]
public readonly TRef<UnicodePipeContract.Exp:READY> Stdin;
[OutputEndpoint("data")]
public readonly TRef<UnicodePipeContract.Imp:READY> Stdout;
reflective internal Parameters();
internal int AppMain() {
return Telnetd.AppMain(this);
}
}
public sealed class Telnetd
{
internal static int AppMain(Parameters! config)
{
Console.WriteLine("Singularity Telnet Daemon - starting.");
Listener listener = new Listener(23);
listener.Start();
while (true)
{
Socket socket = listener.Accept();
Console.WriteLine("Singularity Telnet Daemon - accepting connection");
Connection connection = new Connection(socket);
connection.Start();
}
Console.WriteLine("Singularity Telnet Daemon - stopping.");
return 0;
}
}
}